<template>
<div>
 <el-breadcrumb separator-class="el-icon-arrow-right">
  <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
  <el-breadcrumb-item>权限管理</el-breadcrumb-item>
  <el-breadcrumb-item>角色列表</el-breadcrumb-item>
</el-breadcrumb>
<!-- 卡片视图 -->
<el-card>
    <el-row>
        <el-col>
            <el-button type="primary">添加角色</el-button>
        </el-col>
    </el-row>
    <!-- 角色列表区域 -->
    <el-table :data="rolelist" border stripe>
      <!-- type="expand"表示展开列 -->
      <el-table-column type="expand">
        <template slot-scope="scope">
          <el-row :class="['bdbottom', i1 === 0 ? 'bdtop' : '','vcenter' ]" v-for="(item1,i1) in scope.row.children" :key="item1.id">
             <!-- 渲染一级权限 -->
            <el-col :span="5">
              <el-tag closable @close="removeRightById(scope.row,item1.id)">{{item1.authName}}</el-tag>
              <i class="el-icon-caret-right"></i>
            </el-col>
            <!-- 渲染二级、三级权限 -->
            <el-col :span="19">
              <el-row :class="[i2 === 0 ? '':'bdtop','vcenter']" v-for="(item2,i2) in item1.children" :key="item2.id">
                <el-col :span="6">
                  <el-tag type="success" closable @close="removeRightById(scope.row,item2.id)">{{item2.authName}}</el-tag>
                  <i class="el-icon-caret-right"></i>
                </el-col>
                <el-col :span="18">
                  <el-tag type="warning" v-for="item3 in item2.children" :key="item3.id" closable @close="removeRightById(scope.row,item3.id)">{{item3.authName}}</el-tag>
                </el-col>
              </el-row>
            </el-col>
          </el-row>
          <!-- <pre>
            {{scope.row}}
          </pre> -->
        </template>
      </el-table-column>
      <el-table-column type="index"></el-table-column>
      <el-table-column label="角色名称" prop="roleName"></el-table-column>
      <el-table-column label="角色描述" prop="roleDesc"></el-table-column>
      <el-table-column label="操作" width="300px">
         <template slot-scope="scope">
           <el-button type="primary" size="mini" icon="el-icon-edit">编辑</el-button>
           <el-button type="danger" size="mini" icon="el-icon-delete">删除</el-button>
           <el-button type="warning" size="mini" icon="el-icon-setting" @click="showSetRightDialog(scope.row)">分配权限</el-button>
         </template>
      </el-table-column>
    </el-table>
</el-card>

<!-- 分配权限对话框 -->
<el-dialog title="分配权限" :visible.sync="setRightDialogVisible" width="50%" @click="setRightDialogClosed" >
  <!-- 树级控件 -->
  <el-tree :data="rightslist" :props="treeProps" show-checkbox node-key="id" default-expand-all :default-checked-keys="defKeys" ref="treeRef"></el-tree>
  <span slot="footer" class="dialog-footer">
    <el-button @click="setRightDialogVisible = false">取 消</el-button>
    <el-button type="primary" @click="allotRights">确 定</el-button>
  </span>
</el-dialog>

</div>
</template>
<script>
export default {
  data() {
    return {
      rolelist: [],
      // 控制分配权限对话框的显示与隐藏
      setRightDialogVisible: false,
      rightslist: [],
      treeProps: {
        label: 'authName',
        children: 'children'
      },
      // 默认选中的结点Id值数组
      defKeys: [],
      // 即将分配权限的角色id
      roleId: ''
    }
  },
  created() {
    this.getRolesList()
  },
  methods: {
    async getRolesList() {
      const { data: res } = await this.$http.get('roles')
      if (res.meta.status !== 200) {
        return this.$message.error('获取角色列表失败')
      }
      this.rolelist = res.data
      console.log(this.rolelist)
    },
    async removeRightById(role, rightId) {
      const confirmResult = await this.$confirm('此操作将永久删除该文件, 是否继续?', '提示', {
        confirmButtonText: '确定',
        cancelButtonText: '取消',
        type: 'warning'
      }).catch(err => err)
      if (confirmResult !== 'confirm') {
        return this.$message.info('取消了删除!')
      }
      const { data: res } = await this.$http.delete(`roles/${role.id}/rights/${rightId}`)
      if (res.meta.status !== 200) {
        return this.$message.error('删除权限失败!')
      }
      // this.getRolesList()
      role.children = res.data
    },
    // 展示分配权限对话框
    async showSetRightDialog(role) {
      this.roleId = role.id
      // 获取权限的数据
      const { data: res } = await this.$http.get('rights/tree')
      if (res.meta.status !== 200) {
        return this.$message.error('获取权限数据失败!')
      }
      // 把获取到的权限数据保存到data中
      this.rightslist = res.data
      console.log(this.rightslist)
      this.getLeafKeys(role, this.defKeys)
      this.setRightDialogVisible = true
    },
    // 通过递归的形式,获取角色下所有三级权限的id，并保存到数组中
    getLeafKeys(node, arr) {
      // 如果当前node节点不包含children属性,则是三级节点
      if (!node.children) {
        return arr.push(node.id)
      }
      node.children.forEach(item => {
        this.getLeafKeys(item, arr)
      })
    },
    setRightDialogClosed() {
      this.defKeys = []
    },
    // 点击为角色分配权限
    async allotRights() {
      const keys = [
        ...this.$refs.treeRef.getCheckedKeys(), ...this.$refs.treeRef.getHalfCheckedNodes()
      ]
      const idStr = keys.join(',')
      const { data: res } = await this.$http.post(`roles/${this.roleId}/rights`, { rids: idStr })
      if (res.meta.status !== 200) {
        return this.$message.error('分配权限失败!')
      }
      this.$message.success('分配权限成功!')
      this.getRolesList()
      this.setRightDialogVisible = false
    }
  }
}
</script>
<style lang="less">
.el-tag{
  margin: 7px;
}
.bdtop{
  border-top: 1px solid #eee;
}
.bdbottom{
  border-bottom: 1px solid #eee;
}
.vcenter{
  display: flex;
  align-items: center;
}
</style>
